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Combustion & Propulsion Laboratory

Research Highlights

Direct Numerical Simulations (DNS) of turbulent Combustion

LiftedFlames

3-D volume rendering of turbulent lifted hydrogen jet flames in heated coflow near auto-ignition limit. The coflow temperature is 750, 850, and 950 K from left to right. The stabilization mechanisms of the lifted flames are elucidated.


Turbulent lifted ethylene_air jet flame visualization

This is a visualization of a turbulent lifted ethylene/air jet flame in an autoignitive coflow where the particles are colored by temperature and the volume rendered is the hydroperoxy field.


HCCI engine combustion

ICE_Concept_Report_935428Schematic of current and future internal combustion engine concepts: Gasoline, Diesel, and HCCI engines (from Report of the Basic Energy Sciences Workshop on Basic Research Needs for Clean and Efficient Combustion of 21st Transportation Fuels, 2006, DOI: 10.2172/935428)

Schematic of reaction pathways of n-heptane oxidation at different temperatures

Isocontours of participation index of controlling reactions for SCCI combustion


Flame Instabilities

SchematicPI_DaE

The diffusive-thermal instability of opposed nonpremixed tubular flames with small Lewis number of fuel (LeF < 1)


Mesoscale-combustorMesoscale-combustor-2

Hydrogen/air premixed flame stabilization over a square cylinder in a mesoscale combustor. The vortex-shedding behind the cylinder affects the stabilization of the flames


Characteristic boundary conditions for lattice Boltzmann method (LBM)vortex shedding

Vortex-shedding over a square block with different characteristic boundary conditions (CBC), which was simulated with 2-D isothermal multi-relaxation time lattice Boltzmann method (MRT-LBM): Case 1-Conventional CBC (Poinsot and Lele), Case 2-Thompson’s CBC, and Case 3-Improved CBC.


Monte Carlo Simulations (MCS) of Deposit Patterns in Evaporating Droplet

Temporal evolution of the formation of a typical wave-like deposit structure with the total number of particles of 56000. Images from (a) to (f) are shown at the equal intervals of 400 Monte Carlo steps. The important sampling is used in this evolution



Members (May 30, 2014)

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